I've been lurking here for quite a while trying to get ideas for a vivarium. My wife and I saw a few displays at the Daytona show and she was hooked (of course I always have to do the work when she gets hooked).
After reading up on everything from false floors to waterfall construction to the wonders of Great Stuff, and prior experience building acrylic enclosures, I think I'm ready to start my PDF vivarium. I figure a couple of months worth of weekends for construction and planting and a couple of months of growing time and I'll be ready to add some animals.
However, with most projects a man wants to do, I want to go big.

I have an alcove in my dining room that would fit a 3'H x 6'W x 2.5'D enclosure with a 3' tall stand and 6" hood (to hide lighting and misting system). According to the calculator on GARF.org, this would equate to approx. 336 gallons of volume. Using the pics from the Blackjungle.com gallery as the inspiration, I've got the basic design sketched out. The only thing that I keep thinking about heating.
I know that the occupants ultimately drive heating and humidity requirements. After reading last month's Reptiles Mag article on a reader's viv, I've decided that I'd like to houses PDFs and possibly pygmy chameleons
if I can get the temp gradiants correct.
Is it possible to properly heat an enclosure this large? Any thoughts on the best way to go about doing so?